Hi, Although somewhat off-topic: this default HIJING setting is consistent with all of the experiments using inelastic cross sections that include single diffractive processes in their Glauber model calculations. I've not heard a good motivation for this, other than the pragmatic one that the experimental SD cross sections show considerable scatter. ...steve On Jan 26, 2007, at 10:23 AM, J.H. Lee wrote: > Hi, > > Just following up... > The default setting for HIJING includes single diffractive reactions. > (default event option for IHPR2(13) is set to 1 not 0) > > JH > > > Michael Murray wrote: > >> Minutes of BRAHMS analysis meeting 26 January 2007 >> ================================================== >> Michael Murray >> >> Present JJ, Flemming, Ramero, Pawel, Dieter, Steve, Selemon, Dipali >> and Michael, Chris >> >> http://indico.cern.ch/conferenceDisplay.py?confId=11693 >> 09:30 rich vs tof pid (20') Pawel Staszel >> 09:50 net-proton yields study (20') Hongyan Yang (UiB) >> comparisons >> >> >> Action Items: >> Please read Hongyan's draft for wording, Figures are fine so we can >> send in next week. >> >> 1) Pavel will work on electron contamination and on a fair >> comparisons of pion yields identified via rich and TOF2. >> >> 2) Hongyan will work on the wording of her proceedings. >> >> 3) Kris will present his net protons next week. >> >> 4) QM poster people will start to show what they want to show next >> week. >> >> >> Next meeting 9.30am BNL time Friday 2nd February. >> Pawel will give a detailed description of his analysis and we should >> have a first look at Quark matter poster contributions. >> >> >> >> >> Muons and electrons in p+p @62GeV P. Staszel >> ============================================= >> >> For setting 4B608 p vs Rich radius show e, mu, pi, and k >> He then makes slices in p and deduces yields of each slice. >> Up to momentum ~4GeV one can separate pions and muons. The peaks >> merger around 5GeV. >> FV most of the muons come from pion decay so we have included these >> muons pion yield. >> >> He has compared yield of pions from TOF and RICH. At the moment there >> is a descrepency but he needs to include a cut requiring a CC vertex >> on the RICH results. >> We expect that the CC vertex requirement should not have a momentum >> dependence. When comparing TOF to RICH we need to compare the same >> fiducial acceptance. >> >> He worries about the distribution of tracks identified by TOF2 vs x >> in H2. There seem to be peaks in this distribution. >> Flemming suggests that this is tracks hitting the corners of the >> slats that fire the trigger but do not satisfy the software cuts. >> >> He is going to look into electron contamination on the pion signal. >> >> Net-proton study, Hongyan Yang >> ============================== >> >> She has looked at Phenix and Star proton spectra to see which >> fit function, exponential or Boltzman, to use. Since they don't have >> lot pt coverage several functions work. Using HiGing she finds >> Boltzman does better at low Pt but exponential in Pt does better at >> high Pt. >> For QM proceeding Hongyan will show the range on dN/dy implied by the >> two different functions. >> >> JJ low Pt looks like Boltzman, high Pt looks exponential. >> FV: Are the Pythia plots non single diffractive or not. >> They should be normalized to the total in-elastic cross section. >> Hongyan should also check this for Hijing B. >> JJ thinks that the default for Hijing B is to include non-single >> diffractive events. >> >> Note we have not corrected our data for lambda decay. By default weak >> decay is turned on in the models. >> >> >> Chris is also working on net protons and thinks that he can have a >> comment by next week. >> >> Any other buisness >> ================== >> Flemming would like that each week someone give a detailed >> presentation of their analysis. QM will also publish posters. >> All for posters should show what they want to publish their posters. >> >> >> _______________________________________________ >> Brahms-l mailing list >> Brahms-l_at_lists.bnl.gov >> http://lists.bnl.gov/mailman/listinfo/brahms-l >> >> > > > _______________________________________________ > Brahms-l mailing list > Brahms-l_at_lists.bnl.gov > http://lists.bnl.gov/mailman/listinfo/brahms-l _______________________________________________ Brahms-l mailing list Brahms-l_at_lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-lReceived on Fri Jan 26 2007 - 12:31:43 EST
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